fixed go test command

teapot-server.go

@@ -19,7 +19,7 @@ func handler(w http.ResponseWriter, r *http.Request) {
 
 	// Write the content to the response writer
 	w.WriteHeader(http.StatusTeapot)      // Set the 418 status code
-	fmt.Fprintf(w, string(content))  //Write the entire content as a string
+	fmt.Fprintf(w, "%s", string(content)) //Write the entire content as a string
 }
 
 func main() {